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to_flipper pyfits style Header fixes #35 #36

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to_flipper pyfits style Header fixes #35 #36

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49aa8e5
to_flipper fix
msyriac Jan 3, 2018
4d284da
flipper import fixes
msyriac Feb 26, 2018
2107e74
tabs fix
msyriac Feb 27, 2018
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15 changes: 12 additions & 3 deletions enmap.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1115,19 +1115,28 @@ def to_flipper(imap, omap=None, unpack=True):
by from_flipper does not give back an exactly identical map to the one
on started with.
"""
import flipper
import flipper.liteMap as lm
from astLib import astWCS
import pyfits
if imap.wcs.wcs.cdelt[0] > 0: imap = imap[...,::-1]
# flipper wants a different kind of wcs object than we have.
header = imap.wcs.to_header(relax=True)
header['NAXIS'] = 2
header['NAXIS1'] = imap.shape[-1]
header['NAXIS2'] = imap.shape[-2]
flipwcs = flipper.liteMap.astLib.astWCS.WCS(header, mode="pyfits")

cardList = pyfits.Header()
keys = ['NAXIS','NAXIS1','NAXIS2','CTYPE1','CTYPE2','CRVAL1','CRVAL2','CRPIX1','CRPIX2','CDELT1','CDELT2','CUNIT1','CUNIT2']
for key in keys:
cardList.append(pyfits.Card(key, header[key]))
hh = pyfits.Header(cards=cardList)

flipwcs = astWCS.WCS(hh, mode="pyfits")
iflat = imap.preflat
if omap is None:
omap = np.empty(iflat.shape[:-2],dtype=object)
for i, m in enumerate(iflat):
omap[i] = flipper.liteMap.liteMapFromDataAndWCS(iflat[i], flipwcs)
omap[i] = lm.liteMapFromDataAndWCS(iflat[i], flipwcs)
omap = omap.reshape(imap.shape[:-2])
if unpack and omap.ndim == 0: return omap.reshape(-1)[0]
else: return omap
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